Low Carb Sweet Onion Sauce

Transform your meals with this irresistibly flavorful Low Carb Sweet Onion Sauce, a healthier twist on a classic condiment! Made with naturally sweet Vidalia onions, buttery caramelization, and a perfect balance of tangy apple cider vinegar and savory soy sauce (or coconut aminos), this sauce delivers bold, rich flavor without the carbs. A touch of low-carb sweetener and optional thickening with xanthan gum make it the ideal complement to grilled meats, roasted veggies, or even as a dipping sauce. Ready in just 30 minutes, this gluten-free, keto-friendly recipe is as versatile as it is delicious, making it a must-try for low-carb enthusiasts.

Nutriscore Rating: 60/100

Prep Time:10 mins

Cook Time:20 mins

Total Time:30 mins

Servings: 8

Ingredients

• 2 medium Vidalia onions (or any sweet onion)
• 2 tablespoons Butter (unsalted)
• 1 teaspoon Minced garlic
• 2 tablespoons Low-carb sweetener (like erythritol or monk fruit)
• 1 tablespoon Apple cider vinegar
• 1 tablespoon Soy sauce (or coconut aminos for gluten-free option)
• 1 cup Water
• 1 teaspoon Salt
• 0.5 teaspoon Black pepper
• 0.25 teaspoon Xanthan gum (optional, for thickening)

Directions

Step 1

Peel and finely chop the onions into small pieces for a smoother sauce texture.

Step 2

In a medium saucepan, melt the butter over medium heat until bubbling.

Step 3

Add the chopped onions to the pan and cook for 8-10 minutes, stirring occasionally, until they soften and begin to caramelize.

Step 4

Stir in the minced garlic and cook for another 1-2 minutes until fragrant.

Step 5

Add the low-carb sweetener, apple cider vinegar, soy sauce (or coconut aminos), and water to the saucepan. Stir to combine.

Step 6

Season with salt and black pepper, and bring the mixture to a gentle simmer.

Step 7

Let the sauce cook for 10 minutes, stirring occasionally, until slightly reduced and flavors are well combined.

Step 8

For a thicker sauce, whisk in the xanthan gum and continue cooking for an additional 1-2 minutes, ensuring no lumps form.

Step 9

Allow the sauce to cool slightly before serving. Store leftovers in an airtight container in the refrigerator for up to 5 days.

Nutrition Facts

Serving size	(633.0g)

Amount per serving	% Daily Value*
Calories	347.1

Total Fat 23.4g	0%
Saturated Fat 14.7g	0%
Polyunsaturated Fat 0g
Cholesterol 62mg	0%
Sodium 3363.5mg	0%
Total Carbohydrate 55.3g	0%
Dietary Fiber 6.0g	0%
Total Sugars 15.1g
Protein 4.7g	0%

Vitamin D 14IU	0%
Calcium 95.5mg	0%
Iron 1.1mg	0%
Potassium 577.4mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 46.7%

Protein: 4.2%

Carbs: 49.1%